Engine cross-head



"-(NoMoaem- A f ApTfSNODGRASS ENGINE CROSJHLMJ.l

Patented Aug. '7, 1894.

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UNITED STATESY ARTHUR T. SN ODGRASS, OF DO'IHEN, ALABAMA ENGINECROSS-HEAD.

SPECIFICATION forming part of Letters Patent N o. 524,074, dated August'7, 1894.

Application filed April 13, 1894. Serial No. V507,433. (No model.)

T all whom it may concern:

Be it known that I, ARTHUR T. SNoDGRAss, a citizen of the United States,residing at Dothen, in the county of Henry and State of labama,haveinvented a new and useful Engine Cross-Head, of which the followingis a specification.

The object of this invention is to produce a more eective and generallydesirable lubricator for engine cross-heads,- and this end I attain byforming an oil-chamber in each slide or guide, and so varranging it thatthe oil will be continually fed to the crosshead as it reciprocates inoperation, all of which will be more fully described hereinafter andinally embodied in the claims.

In the accompanying drawings: Figure 1 represents a perspective view ofa cross-head slide embodying the essential features of my lnvention;Fig. 2, a plan View thereof, showing the top guide-plates removed; Fig.3, a

`cross-section taken on the line -x of Fig. 2; Fig. 4, a longitudinalsection on the line t y of Fig. 2; Fig. 5, a plan view of one of theguide-grooves; Fig. 6, a detail perspective of the cross-head.

The reference numeral 1 indicates the frame ofthe engine to which I haveshown my improvements applied; 2 the piston-rod and 3 the cross-head, towhich the rod 2 is rigidly secured as usual. The cross-headV 3 consistsof a metallic block provided with the recess 4, across which the stoutspindle or rod 5, eX- tends; By this means the pitman 6 is pivotallyconnected to the cross-head. Formed on the upper face of the cross-head3, and in vertical alignment with rod 2, is the stud or projection 7,While the under surface of the block is formed with the longitudinal andparallel grooves 8 therein. These grooves 8 are two v in number, and areprovided to form the ribs 9, which are also two in number and adapted tofit Within the longitudinal guide-grooves 10, of the frame l. Thus thecross-head is mounted. The grooves 10 are one for each of the ribs 9 andare formed one in each of the longitudinal beams 11, of the frame. Thesebeams 11 may be rigidly secured to or formed integral with the frame,and the grooves are angular in vcross-section, so that they will snuglyreceive the ribs 9. The beams 1l have longitudinal passages 12 formedtheredle thereof. The

in, and these extend from a point near the inner ends thereof entirelythrough the beams and out at the outer ends of the beams; a cock 13being provided for the opening of each passage, whereby it may beclosed.

Communicating with the passages 12, and

' extending vertically from the grooves 10, are

the openings or auxiliary passages 14, three for each groove, which arearranged one at n each end of each groove and one aty the midopenings14, which are arranged at the ends of the grooves 10, are provided attheir upper ends with the transversely-extending slots l5. These slotseX- tendthe entire width of the grooves 10, and serveto catch and retainthe grit which may fall into the grooves, as will be better describedhereinafter. Formed in the ends of the lbeams 1l are the verticalpassages 16, which are screw threaded and adapted for the reception` ofthe bolts 17.

The bolts 17 are one for each passage 16, and are provided to hold theupper or guidebeams 18 in place, a sleeve 19 being placed on each bolt,and upon which the beams 18 rest, whereby they are held incapable 0fdownward movement, upward movement being rendered impossible by theheads of the bolts. The beamslS are, as will be readily seen, two innumber and are adapted to lie above the cross-head and one on each sideof the stud 7 of such device. By these means the cross-head is securelyheld in place and allowed the free and unrestrained reciprocal movementnecessary for such devices.

In operation, the passages 12 are filled with a suitable lubricant,valves or cocks 13 having been first closed, and the lubricant allowedto rise so as to just cover the bottom of grooves l0. As the cross-head3reciprocates it pushes before it the lubricant lying' ahead of its lineof movement, thereby causing the lubricant tol rise in front of thecross-head, which operation will be attended by a pressure in passagesl2, anda consequent rise of the lubricant through the opening 14 to therear of the head, onlyT to be raised and forced outy again by the headwhen it returns, in this Way an eectual lubrication is effected.

By means of the transversely extending Slots 15, the' grit and dustwhich may fall into the grooves 10 are quickly disposed of, since it IOOwill be pushed to either end of the grooves 10 hy means of thereciprocating cross-head, and into the slots 15, from whence it proceedsdown passages 111 and into the slots 12. Cocks 13 are provided to drawoff the contents of the passages 12 and 14, when it is desired ornecessary to clean them. This,however, will be necessary but very seldomin a well-kept engine, probably not more frequently than once in fouryears.

If so desired, a cap or shield may be placed on each side of the beams18, to prevent the splashing of oil from the grooves. It is alsopossible and expedient to arrange an ordinary oil-box upon the beams 18.

Having described my invention, claim isv 1. The combination of apiston-rod, a crosshead connected thereto, a pitman connected to thecross-head, and a iongitudnal'guide for the cross-head, said guidehaving formed and extending longitudinally therein a passage, andopenings or auxiliary passages formed in each end ofthe guide andcommiiiiicatin g with the longitudinally extending passage, said passagebeing adapted for the reception of a lubricant, substantially asdescribed.

2. The combination of a piston-rod, a crosshead connected thereto, apitman connected to the cross-head, and two parallel guides in which thecross-head recprocates, each of said guides being formed with aninterior longiwhat I tudinal passage, and with a second or auxiliarypassage at each end of the longitudinal passage andicommunicatin g withthe bearing face ot the guide, said passages being adapted for thereception of a lubricant,substantially as described.-

3. The combination of a piston-rod, a crosshead connected thereto, apitman connected to the cross-head, and a guide for the crosshead, saidguide having a longitudinal groove in which the cross'head reciprocates,and an interior passage the ends ot which communicate respectively withthe ends of the said groove, said passage being adapted for thereception ot a lubricant, substantially as described.

4. A longitudinal guide provided in its face with a groove and having alongitudinal passage communicating at each end with the coi'- respondingend of thc groove, said passage being adapted to contain alubricant, anda crosshead having a rib to tit in said groove in the face of the guide,in combination with a piston-rod, and a pitinan connected to thecrosshead, substantially as specified.

1n testimony that I claim the foregoing as my own l have hereto afxed mysignature in the presence of two witnesses.

ARTHUR T. SNODGRASS.

XVitnesses:

Jon BAKER, Jr.,

W. J. JENKINS.

